Will my data be visible to my competitors, or suppliers? It is your data. Your data is not available to others and will not be sold to others. Only you decide who has access to your data. Data transmission is protected with encryption keeping it safe.

How many licenses are available and for what operating systems? You do not need a license, you do not need to install anything, and yes it works on all operating systems including for mobile devices. You only need Internet access.

The operations department should see other data than the technical department, and not everyone should see the same vessels. Of course, no problem. You can even hand out passwords to clients, for example to monitor their cargo status or expected ETA.